JPH0585597U - Perforator - Google Patents

Abstract

(57) [Abstract] [Purpose] Compact and lightweight, simple structure and low cost. An output shaft 12 having a screw portion 10 and a flange portion 11 for concentrically mounting the tip tool 9 is provided on the tip side thereof, and the output shaft 12 is provided with a shock to the output shaft 12 when the tip tool 9 is locked. The impact absorbing means of the punching machine provided with the impact absorbing means for alleviating is provided between the end surface of the flange portion 11 and the tip tool 9 and is formed by a deformable member such as a washer 16. Is characterized by. [Effect] Since the impact is moderated by the deformable member such as the washer, it is not necessary to provide the slip clutch device unlike the conventional case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a punching machine.

[0002]

[Prior Art]

 FIG. 7 shows a conventional example of a punching machine. As shown in the figure, the drill body 1 is vertically slidably mounted on a pole 2 and is vertically moved by turning a handle 4 with a pinion that meshes with a rack 3 provided on the pole 2. The rack 3 is fixed to the base 5, and at the time of punching, the base 5 is fixed to the work material with an anchor. The drill main body 1 is provided with a housing 7 that houses the motor 6, and a gear cover 8 that houses the speed reduction unit and the output shaft.

By the way, in the conventional drilling machine, when the cutting edge of the tip tool hits the reinforcing bar in the concrete during drilling and the output shaft is suddenly locked, the impact applied to the gear and pinion which are the power transmission mechanism of the drilling machine. A slip clutch device was built in to relieve the force.

[0004]

[Problems to be solved by the device]

 Since the conventional punching machine incorporating the slip clutch device has the slip clutch device incorporated therein, it has a large size, a heavy weight, a complicated structure, and is expensive. Also, maintenance was difficult due to the adjustment of slip torque.

The present invention has been made in view of the above points, and an object of the present invention is to provide a punching machine which is small and lightweight, has a simple structure, and is inexpensive.

[0006]

[Means for Solving the Problems]

 The above object is achieved by forming the shock absorbing means by a deformable member that is provided between the end surface of the flange portion and the tip tool.

[0007]

[Action]

 Since the above-mentioned means is provided, the impact is mitigated by the deformable member, and it is not necessary to provide the slip clutch device as in the conventional case.

[0008]

【Example】

 Next, the present invention will be specifically described with reference to examples.

1 and 2 show an embodiment of the present invention. Since the same parts as those in the conventional art are designated by the same reference numerals, the description thereof will be omitted. An output shaft 12 having a screw portion 10 and a flange portion 11 for concentrically attaching the diamond core bit 9 of the tip tool is provided on the tip side thereof, and the output shaft 12 is impacted to the output shaft 12 when the diamond core bit 9 is locked. In the punching machine provided with the shock absorbing means for relaxing the shock absorbing means, in this embodiment, the shock absorbing means is provided between the end surface of the flange portion 11 and the diamond core bit 9 and is formed of a deformable member. By doing so, the impact is mitigated by the deformable member, and it is not necessary to provide a slip clutch device as in the past, and it is small and lightweight, and the structure is simple and inexpensive. You can get the punching machine.

That is, the pinion 13 connected to the motor is decelerated by the gear 14 in two steps to rotate the output shaft 12. The output shaft 12 is supported by a ball bearing 15, and a flange portion 11 for mounting the diamond core bit 9 and a screw portion 10 are formed at the tip portion. A deformable member such as a washer 16 is fixed to the end surface of the flange portion 11 by an O-ring 17 so as not to drop even if the diamond core bit 9 is removed.

The diamond core bit 9 of the tip tool is attached to the thread portion 10 at the tip of the output shaft 12, and the washer 16 is sandwiched between the washer 16 and the flange portion 11 of the output shaft 12. The tip threaded portion 10 is a right-handed screw, and the output shaft 12 is also rotated to the right. Therefore, a load is applied in the direction of increasing the tightening force during drilling.

When the cutting edge of the diamond core bit 9 hits the reinforcing bar in the concrete during drilling and the output shaft 12 is suddenly blocked, the washer 16 elastically or plastically deforms the tightening force that shocks and outputs. It is possible to suppress the transmission of the tightening force to the shaft 12 and reduce the impact applied to the gear 14 and the pinion 13.

As described above, according to the present embodiment, the slip clutch device is not provided, and the deformable member incorporated in the flange portion of the output shaft, for example, the washer is deformed so that the impact load acting on the diamond core bit is directly applied to the output shaft. Since the transmission can be reduced, the punching machine can be made small, lightweight and inexpensive.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the shock absorbing means is formed by having the washer 16 and the groove portion 18 provided on the outer peripheral portion of the output shaft 12 and absorbing the deformation of the washer 16. By doing so, the washer 16 is easily deformed, and the impact on the output shaft 12 can be alleviated more than in the case described above.

That is, when the output shaft 12 is suddenly locked, the washer 16 that is about to be deformed in the radial direction has a wider allowable deformation range of the washer 16 due to the groove portion 18 provided on the outer periphery of the engaging portion of the washer 16. Deformation is promoted.

4 and 5 show another embodiment of the present invention. In the present embodiment, the impact absorbing means is formed on the flange portion 11a of the output shaft 12 on the tip tool 9 side integrally with the flange portion 11a, and is deformed by the impact lock torque (22 to 40 kg · m). Formed at 19. By doing so, when the impact lock torque is received, the collar-shaped member 19 is deformed to absorb the impact, and the impact when the impact lock torque is received can be alleviated. Incidentally, the collar-shaped member 19 does not deform under the practical torque (1 to 8 kg · m).

That is, when the core bit 9 receives an impact lock torque and suddenly locks during drilling, a large thrust acts on the collar-shaped member 19 and the outer edge is elastically deformed, so that the gear 14 and the pinion 13 are deformed. The impact load acting is relaxed.

FIG. 6 shows still another embodiment of the present invention. In this embodiment, the brim-shaped member 19 is formed integrally with the tip tool 9a at the end of the tip tool 9a on the flange portion 11 side. In this case as well, it is possible to obtain the same effects as the above case.

[0019]

[Effect of the device]

 As described above, in the present invention, the shock absorbing means is provided between the end face of the flange portion and the tip tool and is formed of a deformable member, so that the shock can be absorbed by the deformable member. It is not necessary to provide a slip clutch device as in the conventional case, and it is possible to obtain a small-sized and light-weight perforator having a simple structure and low cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an embodiment of a punching machine of the present invention.

FIG. 2 is an enlarged view of a tip tool attachment portion of FIG.

FIG. 3 is an enlarged view of a tip tool mounting portion of another embodiment of the punching machine of the present invention.

FIG. 4 is a vertical sectional side view of still another embodiment of the punching machine of the present invention.

5 is an enlarged view of the tip tool attachment portion of FIG. 4. FIG.

FIG. 6 is an enlarged view of a tip tool mounting portion of a punching machine according to another embodiment of the present invention.

FIG. 7 is a perspective view of a conventional punching machine.

[Explanation of symbols]

9 and 9 are tip tools (diamond core bits), 10 are screw parts, 11 and 11a are flange parts, 12 is an output shaft, 1
6 is a washer, 18 is a groove, and 19 is a brim-shaped member.

Claims (5)

[Scope of utility model registration request] 1. An output shaft having a screw portion and a flange portion for concentrically mounting a tip tool on its tip side is provided, and when the tip tool is locked, the output shaft absorbs a shock to the output shaft. In the punching machine provided with impact absorbing means, the impact absorbing means is provided between the end surface of the flange portion and the tip tool and is formed of a deformable member, Punching machine. 2. The punching machine according to claim 1, wherein the deformable member is a washer. 3. The shock absorbing means includes the washer,
The punching machine according to claim 1 or 2, wherein the punching machine is provided on an outer peripheral portion of the output shaft and has a groove portion that absorbs deformation of the washer. 4. The deformable member is a flange-shaped member that is integrally formed with the flange portion of the output shaft on the tip tool side and that is deformed by impact lock torque. The punching machine according to Item 1. 5. The punching machine according to claim 4, wherein the collar-shaped member is formed integrally with the tip tool at an end of the tip tool on the side of the flange portion.